Rail Wars!

Takayama Naoto is a high school second-year who dreams of being a train conductor. In hopes of getting a job with Japan National Railways, one of the most stable businesses in Japan due to government support, Naoto has applied to an on-the-job training program for students.

Having qualified for on-the-job training, Naoto is assigned to K4, the Tokyo Central Railway Security 4th Guard Team. Waiting for him there are his partners from JNR Central Academy: Aoi, Haruka, and Sho. They immediately set about their work at Tokyo Station, but as if being teamed up with the gruff Aoi didn't worry him enough, Naoto is increasingly anxious as he watches the Tokyo Public Security Mobile Police set out on a mission.

Sassho Mari, like Naoto, is a second year at Kiryu Railway High School. She's into cooking, cleaning, doing laundry, and collecting recordings of train sounds. In hopes of working as an attendant in a railway-related company, she's begun on-the-job training with JNR's subsidiary, Japan Restaurant Enterprise Co., Ltd.

The popular idol Kashima Noa is named the honorary railway security team leader for the day, and K4 is appointed to guard her. They accompany Noa on the Odoriko special express to a JNR-sponsored event taking place on a beach near Ito Station.

Early in the morning, Naoto is dragged into shooting practice with Aoi beneath Tokyo Station. When they finish, Aoi still doesn't seem satisfied. Then Naoto gets a message from Mari about plans for their school's trip the next day.

The members of K4 have been punished with at-home suspension for their reckless actions on the Ashio Line. Naoto is relaxing at home when he receives a note in the mail that turns his mood upside-down: an anonymous death threat. He calls Aoi for advice, but there's no answer.